The north of the U.S. was considered to be more advanced because they had a lot better technology and they were more on the industry side, where as the south did agriculture
Martin Luther wrote the 95 Thesis and posted it on the church's door. <span />
During World War II, the Double V campaign<span> was a movement by African Americans demanding equal rights in exchange for the sacrifices they were making in the war. The </span>Double V campaign<span> represented two victories, one in the war and one against the inequality in the country</span>
I think the answer is because Duverger’s law is a political theory that says democracies with single-member legislative districts and winner-take-all voting tend to favor a two-party system.